{"dataset":"MainBuyer UK price observations","market":"GB","market_name":"United Kingdom","methodology":"Each observation is stored only when MainBuyer has a timestamped checked retailer offer. Missing days are not interpolated or invented. Historical low, high and median figures use recorded in-stock observations only.","observations":[{"currency":"GBP","in_stock":true,"observed_at":"2026-09-17T12:30:30+00:00","price":"15.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0GCZKGJQ7?maas=maas_adg_api_588052515283475030_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PBf3f02c3e232dee00843a38531c9c53d5&aa_adgroupid=f475108393e17a41e1e7035f89971fe2_PBSEP_!!!affid!!!_118045_&aa_creativeid=03b27bjXHvDCKifKG5qe_a18vdJOYEmANo_aLD9kPVX800YVc_c"}],"product":{"brand":"pluseight UK","evidence_url":"https://mainbuyer.com/evidence/products/stainless-steel-tumbler-with-straw-660ml-22oz-tumbler-with-leak-proof-2-in-1-lid-reusable-double-walled-water-bottle-portable-coffee-travel-mug-fi-b0gczkgjq7/prices","gtin":null,"id":12805,"model_number":null,"name":"Stainless Steel Tumbler with Straw, 660ml/22oz Tumbler with Leak Proof 2-in-1 Lid, Reusable Double Walled Water Bottle, Portable Coffee Travel Mug, Fi","product_url":"https://mainbuyer.com/product/stainless-steel-tumbler-with-straw-660ml-22oz-tumbler-with-leak-proof-2-in-1-lid-reusable-double-walled-water-bottle-portable-coffee-travel-mug-fi-b0gczkgjq7","urn":"MB-AWIN-GB-B0GCZKGJQ7"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"15.99","historical_low":"15.99","last_observed_at":"2026-09-17T12:30:30+00:00","low_30d":"15.99","low_90d":"15.99","median_price":"15.99","observation_count":1,"priced_observation_count":1,"retailer_count":1,"span_days":0,"tracked_since":"2026-09-17T12:30:30+00:00"}}